Blowing snow at Mizuho station, Antarctica
Blowing snow at Mizuho station, Antarctica
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DOI：
10.1098/rsta.2005.1599
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发表时间：
2005-07
期刊：
影响因子：
--
通讯作者：
K. Nishimura;M. Nemoto
中科院分区：
文献类型：
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作者：
K. Nishimura;M. Nemoto
2000年10~11月在南极洲瑞穗站进行了吹雪观测。一个吹雪观测系统包括雪粒子计数器，它不仅可以感测雪粒子的数量，而且可以感测它们的直径，该系统位于一个30米高的塔上。所有仪器工作正常，获得的数据显示的质量通量和颗粒大小分布的摩擦速度的函数的配置文件。测量结果进行了比较，吹雪模型占大多数的物理过程，包括空气动力学夹带，颗粒/床碰撞，风的修改，颗粒的粒径分布和湍流波动的颗粒轨迹。仿真结果与实测结果吻合较好，验证了模型的有效性。该模型能够精确地描述从跃移到悬浮的水平质量通量的垂直分布以及颗粒的粒径分布，这是以往模型所不能实现的。
Blowing snow observations were carried out at Mizuho station, Antarctica, from October to November 2000. A blowing snow observation system including snow particle counters, which can sense not only the number of snow particles, but also their diameters, was situated on a 30 m tower. All instruments worked correctly and the data obtained revealed profiles of mass flux and particle size distributions as a function of the friction velocity. Measurements were compared with a blowing snow model that accounted for most physical processes including aerodynamic entrainment, grain/bed collisions, wind modification, particle size distribution and turbulent fluctuations on the particle trajectories. Simulated and measured results showed close agreement, and the validity of the model was demonstrated. Vertical profiles of horizontal mass flux from saltation to suspension, as well as the particle size distributions were expressed precisely, which could not be achieved using the previous models.